Heat treatment device and method for large-scale converter steel plate furnace shell

Abstract

The invention discloses a heat treatment device for a large steel plate converter shell. The heat treatment device for the large steel plate converter shell comprises an oil supply system, a combustion system, a temperature measurement control system, a dedusting system, a heat preservation system and a heat treatment protection system. The heat treatment protection system comprises heat insulation materials, a backing ring supporting device and a converter supporting follow-up device. The heat insulation materials are arranged between a converter body and a backing ring. The backing ring supporting device tightly abuts against the backing ring. The converter supporting follow-up device is arranged at a converter mouth. The invention further provides a heat treatment method for the large steel plate converter shell. By the adoption of the heat treatment device and method for the large steel plate converter shell, the assembly precision of the converter shell can be guaranteed, the safety using requirement for a converter can be met, and the cost is relatively low.

Description

technical field [0001] The invention relates to the technical field of heat treatment, and more specifically, the invention relates to a device and method for heat treatment of a steel plate furnace shell of a large-scale converter. Background technique [0002] The large-scale converter is the key equipment in the steelmaking plant. The converter shell works under the conditions of high temperature, heavy load and frequent tilting. Therefore, the furnace shell not only bears the mechanical force load but also bears the thermal load during operation, so it prolongs its Working life is critical for cost reduction in steelworks. There are many factors that affect the life of the converter shell. The material of the furnace shell must consider the crack resistance of the material to avoid thermal fatigue cracks. Creep resistance, so the requirements for furnace shell materials are becoming more and more stringent, the alloy content is getting higher and higher, and the difficu...

AI Technical Summary

Problems solved by technology

In addition, the supporting device between the converter and the support ring has a large amount of welding, and the welding stress after assembly is correspondingly large. Since the converter support ring has formed a large rigid body, local annealing to eliminate stress will produce a large temperature gradient on the furnace shell. Stress affects the accuracy and safe use of the furnace shell

If the overall electric heating annealing is used, the furnace shell weighs more than 200 tons and requires more than 2,000 kilowatts of electricity. It is impossible to have such a high capacitance on the online annealing site, and it is impossible to carry out

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